The International Radiotelegraph Conference in Berlin selected “SOS” (· · · – – – · · ·) as the global standard for radio distress calls.
The SOS code was implemented internationally on July 1, 1908.
The International Radiotelegraph Conference in Berlin selected “SOS” (· · · – – – · · ·) as the global standard for radio distress calls.
The SOS code was implemented internationally on July 1, 1908.